Coffee-roaster.



No. 830,891. v PATENTED SEPT. 11, 1906. J. M. EDWARDS.

COFFEE ROASIER. APPLICATION FILED NOV. 14, 1905.

2 SHEETS-SHEET'I.

Wifwmaeo amazing PATBNTBD SEPT. 11, 1906.

J. M. EDWARDS.

COFFEE ROASTER. APPLICATION FILED NOV.-14.1905.

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1 08 messes UNITED s'ra 'rns PATENT ()FFIOE.

7 JAMES M. EDWARDS, or MORRIS PARK, NEW YORK.

COFFEE-ROASTER. v

Specification of Letters Patent.

' Patented Sept, 11, 1906.

Application filed November 14, 1906. Serial lie. 287,303.

To all whom, 'it may concern.

Be it known that 1, JAMES M. EDWARDS, of

7 Morris Park, in the county of Queens and State of New York, have invented certain new and useful Improvements in Cofiee- Roasters; and. I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of roasters employing a rotary cylinder de:

signed to contain the coffee or other grain,

such cylinder being arrangedwithina housing and above the fire, so that the heat Will contact with its outer surface. In roasters of this description as previously constructed difficulty was found in creating sufficient circulation of the heated air through the cylin der and the mass of grain therein. This difficulty was partly overcome by the employment of cylinders of wire mesh'with passages formed by tubes of the same materialextendmg throu h the cylinder. In other forms of roasters t e heated air has been introduced into the cylinder at its end. In all of the roasters as heretofore constructed, however, and even in those having sufiicient draft the difficulties encountered were that the grain was detrimentally affected by the flame and hkewise by the smoke arising from burning chaff, while the chaff itself and the dust were contact with the grain.

\ A further object is to provide a course of either permitted to escape or the means designed tocontrol them tended to retard the draft.

The object of my invention is toprovide a roaster in which the grain is treated by the action of heat at such a point away from the combustion that the products thereof may entrain sufficient pure air before coming'in .showing a roaster embodying my invention. Fig. 2 is a top plan view with the cover removed. Fig. 3 is a side elevation, partly broken away. Fig. 4 is a section on line 4 4, Fig. 3. Fig. 5 is a view of the cylinder removed.

Referring to the drawings, 1 designates a housing or casing. This is shown formed with three compartments 2 3 4.1

5 is the rotary cylinder mounted upon a shaft 6, eirtending through the housing.

7 is a supply-pipe through which the grain is fed to the cy inder. This is shown verticall disposed in compartment'3 and having its ower end projected into a spout 7, secured to the casing and extending intoan o 'l e compartment 2 is-ofsuch height as to ening 8 in the end or head of the cylinder.

provide ample space between the cylinder which is at its top and the burners 9 at the bottom, thus affording opportunity for the,

roducts of combustion entrainin 'fresh air efore reaching the cylinder. A amper 10 below the cylinder and a curved deflectorplate 12 are designed to re ulate and direct the sup 1y of heat to the cy inder. The Wall 13 of t e casing separates compartment 2 from compartments 3 4, and communication between the cylinder and compartment 3 is established through spout 7 15 is a wall'extending. transversely of the housing from one outer wall to the wall 13 and separating compartments 3 4. The only' outlet-from the cylinder is through the opening 8 and spout 7 to compartment 3. The

wall 15 extends well down to near the bottom of the compartments, and below it the two compartments are in communication. At the bottom of com artment 3 is. a receptacle 16 for dust and c afi.

From what has thus far been s'aidit will be seen that the line of direction of the draft is upward in compartment 2 into the cylinder, thence to compartment 3, downwardly in this compartment to thechaif-receptacle' 16,

beneath Wall 15 and up through compartment 4, at the top of which latter is a damper 17 for the purpose of regulating the discharge of the heated air accordin to the nature 'of the grain being treated. ractice has demonstrated that the sin le line of direction for the draft, as describe insures the products of combustion emitted from com artment 4 bein relatively free from cha and dirt, near y all of the latter being collected in the receptacle 1-6. The possibility of smoldering chaff remainin in the grain is reduced to a minimum, and t e grain itself is not detrimentally affected by the flame from the and. secured to the cylinder ends. Any desired number of these vanes may be employed, three being illustrated. They are of such width and disposition that they overlap each other, the overlapping portions bein curved inwardly to provide an-unobstruct space between the vanes, the latter being out tudinally,

of en a ement with each other and supported 0 y y the cylinder ends. Attheir nner lon itudinal ed es the vanes are provided Wit racks 20, s own formed by bendingthe vanes. The racks are sli htly slanted lon so that they wi tend to throiirt e grain from end to end of the cylinder. When the cylinder as thus constructed is rotated in thedirection indicated by the arrow at, the grain contained in the c linder will be as efectively retained as if t e body of the latter were formed with a sin le-continuous wall, the grain fallin from t e rack ofone vane onto the vane beneath. At the same time opportunity for entrance of the-heat is provided by the space betweenthe vanes, While obviously the vanes themselves may be made of wire. mesh or other foraminous maeample terial, if desired, although I have shown them as of sheet metal, practice havingv demonstrated that ample-circulation of the draft results from that construction. When,

. however, the cylinder is rotated in the direc contents will passout tion indicated by the arrow 1), the grain or structed s aces between the vanes, and thus the cylin er .may readily be emptied. This construction avoids the necessitg for era ping the cylinder with outlets an contro means. When thecylinder'is to be emptied,

a tray or receptacle may be placed above the burners to receive the roasted grain, or an outlet may be formed in the'casing and the damper 10 employed as a deflector. I 1

Any heat-producing agency may be employed, such as coal or gas. The particular orm of burner, together with a sampling device and cooler forthe roasted grain, form no part of the present invention and are not shown or described. a Practice has demonstrated that in the roasting of coffeeacoordin'g to'my invention a dry pure heatbeing mployed, the steam generated from the coffee and charged with volatile and aromatic juices acts upon the ain to soften it and loosen the skin or chafi.

his steam being by regulation of the draft retained in contact with the conditions may require absor the dry heat through the unob-.

uipling ain as long as agent, sealing the juices in the cofiee-beans,

and thus retaining and developing the active principles of the grain. Under some cirand assumes the properties of a cooking I cumstances it may be desirable to conduct the chafi out of compartment 3 before collecting the same. This may readily be done by arranging the receptacle 16 outside of the casing and forming an outlet in the latter suitably controlled to permit the exit of the chaff without-affecting the draft.

I claim as my invention- 1. In a roaster, a housing, a com artment therein, a rotary cylinder .mounte in said compartment, a second compartment in said housing in communication'with said cylinder,-an outlet from said second compartmentat the bottom thereof, and a flue leading from said outlet to the top of said'housin whereby the line of direction of the dra from said cylinder is downward in said second compartment and upward through said flue, for the purpose stated.

2. In a roaster, a housm wall, a partition extending from one side of having a central V said housing to said wall and forming a com partment and a flue in communication with each other, apassage-way .being' formed in,

said Iwall opening into said compartment, and a rotary cylinder having an open endreiisterjng with said passage-way, as set fort compartment in communlcation with said second compartment near the bottom of the latter, and an outlet at thetop of said third compartment.

3.. In a roaster,' a housing having three compartments, a rotary cylinder mounted in one of said compartments, a second compart- 4. In a'roaster for coffee or other grains, a

rotary cylinder having its body portion-consisting of overlapping vanes secured at their vanes being free intermediate the cylinderheads to provide unobstructed spaces between said vanes, for the purposestated,

5. In a roaster for coffee or other grains, a

rotary cylinder having itsbody portion con-2 sisti-ng of overlapping vanes, said vanes bein bent at their inner edges to form racks, a the several racks slanted longitudinally.

In testimony whereof I have signedthis GRAFTON L. MoGrLL, ALIcE Lmn.

ends to the cylinder-heads, both of the lon- I v gitudinal edges and faces of each of said 

